Class #8 Flashcards
Volume
the total amount of space occupied by something
Capacity
the volume of something that can be functionally used
Spirometer
a device that measures lung volumes and capacities
Tidal volume (TV)
the amount of air we breathe during one pulmonary ventilation (1 inhalation and 1 exhalation) of quiet creating
- average = 525ccs or .5 liters
Inspiratory Reserve Volume (IRV)
the amount of air breathed in above and beyond the tidal inhalation
- average = about 2475 cc or 2.5 liters
Expiatory Reserve Volume (ERV)
the amount of air breathed out above and beyond the tidal exhalation
- average = about 1000 cc or 1 liter
Residual Volume (RV)
the volume remaining in the lungs after a maximal exhalation
- average = about 1100 cc or 1.1 liters
Vital Capacity (VC)
the total capacity of air available for speech
- IRV + ERV + TV = VC
- average = about 4000 ccs or 4.0 liters
Total Lung Capacity (TLC)
the total capacity of the lungs
- IRV + ERV + TV + RV = TLC
- average = about 5100 ccs or 5.1 liters
Inspiratory Capacity (IC)
the maximum inspiratory volume
- TV + IRV = IC
- average = about 3000ccs or 3 liters
Functional Residual Capacity (FRC)
the amount of air that is in the lungs after a quiet exhalation
- ERV + RV = FRC
- ERV + RV = FRC
- average = 2200 ccs or 2.2 liters
Average inspiratory capacity in adults
- Males: 3600
- Females: 2400
- Average in cc: 3000
Average total lung capacity in adults
- Male: 6000
- Female: 4200
- Average in cc: 5100
Why is there a difference between male and female capacities?
Men are physically larger than women
Which capacity is most important for SLPs to know about? Why?
Inspiratory Capacity because SLPs work with people who have impaired inspiratory capacities
